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Finding the Fourth Proportional to 981.31, 1,470.59 and 737.68

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Solution

The fourth proportional to 981.31, 1,470.59 and 737.68 is: 1,105.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.31 : 1,470.59 = 737.68 : x
  2. Step 2: Convert to fraction form
    981.31/1,470.59 = 737.68/x
  3. Step 3: Cross multiply
    981.31x = 1,470.59 × 737.68
  4. Step 4: Simplify right side
    981.31x = 1,084,813.79
  5. Step 5: Solve for x
    x = 1,084,813.79/981.31
  6. Step 6: Final answer
    x = 1,105.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.